| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] [pron] [noun] | 1406 |
|
| 2 | [vb mod] then [vb infin] [pron] [noun] | 77 |
|
| 3 | [modal v] then [vb infin] [pron] [noun] | 77 |
|
| 4 | could then [verb] [pron] [noun] | 6 |
|
| 5 | could then [vb infin] [pron] [noun] | 6 |
|
